Inhibit compiler warnings on DBG() when building a non-debug object,

[people/xl0/gpxe.git] / src / include / compiler.h

diff --git a/src/include/compiler.h b/src/include/compiler.h
index 3aee4a6..f4ea32e 100644 (file)
--- a/src/include/compiler.h
+++ b/src/include/compiler.h
@@ -123,9 +123,19 @@ __asm__ ( ".equ\t" OBJECT_SYMBOL_STR ", 0" );
 __asm__ ( ".equ\tDEBUG_LEVEL, " DEBUG_SYMBOL_STR );
 #endif
 
+/** Do not print
+ *
+ * This function is used only for printf()-style format string
+ * checking.  The function body does not exist, and no reference to it
+ * should ever appear in any compiled object.
+ */
+extern int __attribute__ (( format ( printf, 1, 2 ) ))
+__do_not_printf ( const char *fmt, ... );
+
 #define DBG_PRINT(...) printf ( __VA_ARGS__ )
-#define DBG_DISCARD(...) do { if ( 0 ) printf ( __VA_ARGS__ ); } while ( 0 )
-/*#define DBG_DISCARD(...) do {} while ( 0 )*/
+#define DBG_DISCARD(...) do {                                  \
+               if ( 0 ) __do_not_printf ( __VA_ARGS__ );       \
+       } while ( 0 )
 
 #define DBG  DBG_DISCARD
 #define DBG2 DBG_DISCARD